Dell Precision T7400 (Late 2007) - Manual (Page 31)

About Your Computer 31
connector two x16 slots (support x16, x8, x4 and x1
modes/cards)
connector size 164 pins
connector data width (maximum) 16 PCI Express lanes
bus transfer rate
5.0 GB/s/lane/direction (raw bandwidth)
Ports and Connectors
External connectors:
Serial two 9-pin connectors; 16550C-compatible
Parallel 25-hole connector (bidirectional)
IEEE 1394 one front-panel, 6-pin connector and one
rear panel, 6-pin connector
Network adapter RJ45 connector
PS/2 (keyboard and mouse) two 6-pin mini-DIN
USB two front-panel and five back-panel USB
2.0–compliant connectors
Audio two front-panel connectors for microphone
and headphones;
two back-panel connectors for line-in and
line-out
System board connectors:
Floppy drive 34-pin connector
SAS/Serial ATA HDD four 7-pin connectors
Serial ATA three 7-pin connectors
Internal USB one 10-pin connector for optional Media
Card Reader (3.5-inch bay device or secure
boot device)
Video
Video type
PCI Express 2.0 x16 (two slots)
Expansion